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Update moveit_servo tutorial to release 1.3.x of UR5
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rhaschke committed Jan 31, 2023
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10 changes: 5 additions & 5 deletions doc/realtime_servo/realtime_servo_tutorial.rst
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Expand Up @@ -38,25 +38,25 @@ Re-build and re-source the workspace. ::

Launch the Gazebo simulation: ::

roslaunch ur_gazebo ur5.launch
roslaunch ur_gazebo ur5_bringup.launch

roslaunch ur5_moveit_config ur5_moveit_planning_execution.launch sim:=true
roslaunch ur5_moveit_config moveit_planning_execution.launch sim:=true

roslaunch ur5_moveit_config moveit_rviz.launch config:=true
roslaunch ur5_moveit_config moveit_rviz.launch

In RViz, grab the red/blue/green "interactive marker" and drag the robot to a non-singular position (not all zero joint angles) that is not close to a joint limit. Click "plan and execute" to move the robot to that pose.

Switch to a compatible type of `ros-control` controller. It should be a `JointGroupVelocityController` or a `JointGroupPositionController`, not a trajectory controller like MoveIt usually requires. ::

rosservice call /controller_manager/switch_controller "start_controllers: ['joint_group_position_controller']
stop_controllers: ['arm_controller']
stop_controllers: ['eff_joint_traj_controller']
strictness: 0
start_asap: false
timeout: 0.0"

Launch the servo node. This example uses commands from a `SpaceNavigator <https://www.3dconnexion.com/spacemouse_compact/en/>`_ joystick-like device: ::

roslaunch moveit_servo spacenav_cpp.launch
roslaunch moveit_servo spacenav_cpp.launch config:=$(rospack find moveit_tutorials)/doc/realtime_servo/ur_config.yaml

If you do not have a SpaceNav 3D mouse, you can publish example servo commands from the command line with: ::

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68 changes: 68 additions & 0 deletions doc/realtime_servo/ur_config.yaml
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###############################################
# Modify all parameters related to servoing here
###############################################
use_gazebo: true # Whether the robot is started in a Gazebo simulation environment

## Properties of incoming commands
command_in_type: "speed_units" # "unitless"> in the range [-1:1], as if from joystick. "speed_units"> cmds are in m/s and rad/s
scale:
# Scale parameters are only used if command_in_type=="unitless"
linear: 0.6 # Max linear velocity. Meters per publish_period. Unit is [m/s]. Only used for Cartesian commands.
rotational: 0.3 # Max angular velocity. Rads per publish_period. Unit is [rad/s]. Only used for Cartesian commands.
# Max joint angular/linear velocity. Rads or Meters per publish period. Only used for joint commands on joint_command_in_topic.
joint: 0.01
low_pass_filter_coeff: 2. # Larger --> trust the filtered data more, trust the measurements less.

## Properties of outgoing commands
publish_period: 0.008 # 1/Nominal publish rate [seconds]
low_latency_mode: false # Set this to true to publish as soon as an incoming Twist command is received (publish_period is ignored)

# What type of topic does your robot driver expect?
# Currently supported are std_msgs/Float64MultiArray (for ros_control JointGroupVelocityController or JointGroupPositionController)
# or trajectory_msgs/JointTrajectory (for Universal Robots and other non-ros_control robots)
command_out_type: std_msgs/Float64MultiArray

# What to publish? Can save some bandwidth as most robots only require positions or velocities
publish_joint_positions: true
publish_joint_velocities: false
publish_joint_accelerations: false

## MoveIt properties
move_group_name: manipulator # Often 'manipulator' or 'arm'
planning_frame: world # The MoveIt planning frame. Often 'base_link' or 'world'

## Other frames
ee_frame_name: tool0 # The name of the end effector link, used to return the EE pose
robot_link_command_frame: world # commands must be given in the frame of a robot link. Usually either the base or end effector

## Stopping behaviour
incoming_command_timeout: 0.1 # Stop servoing if X seconds elapse without a new command
# If 0, republish commands forever even if the robot is stationary. Otherwise, specify num. to publish.
# Important because ROS may drop some messages and we need the robot to halt reliably.
num_outgoing_halt_msgs_to_publish: 4

## Configure handling of singularities and joint limits
lower_singularity_threshold: 17 # Start decelerating when the condition number hits this (close to singularity)
hard_stop_singularity_threshold: 30 # Stop when the condition number hits this
joint_limit_margin: 0.1 # added as a buffer to joint limits [radians]. If moving quickly, make this larger.

## Topic names
cartesian_command_in_topic: delta_twist_cmds # Topic for incoming Cartesian twist commands
joint_command_in_topic: delta_joint_cmds # Topic for incoming joint angle commands
joint_topic: joint_states
status_topic: status # Publish status to this topic
command_out_topic: /joint_group_position_controller/command # Publish outgoing commands here

## Collision checking for the entire robot body
check_collisions: true # Check collisions?
collision_check_rate: 50 # [Hz] Collision-checking can easily bog down a CPU if done too often.
# Two collision check algorithms are available:
# "threshold_distance" begins slowing down when nearer than a specified distance. Good if you want to tune collision thresholds manually.
# "stop_distance" stops if a collision is nearer than the worst-case stopping distance and the distance is decreasing. Requires joint acceleration limits
collision_check_type: threshold_distance
# Parameters for "threshold_distance"-type collision checking
self_collision_proximity_threshold: 0.01 # Start decelerating when a self-collision is this far [m]
scene_collision_proximity_threshold: 0.05 # Start decelerating when a scene collision is this far [m]
# Parameters for "stop_distance"-type collision checking
collision_distance_safety_factor: 1000 # Must be >= 1. A large safety factor is recommended to account for latency
min_allowable_collision_distance: 0.01 # Stop if a collision is closer than this [m]

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